.preserve-white-spaces-mixin(@enabled) when(@enabled = true) {
    @white-spacing: @layout-gutter;

    // 表单
    form {
        // 按钮
        .ant-btn + .ant-btn {
            margin-left: @white-spacing;
        }
    }
}
.preserve-white-spaces-mixin(@preserve-white-spaces-enabled);
